Frequencies for first 10,000 rows of confid variable in demo2005q4 dataset :

 Whether or |
  not (Y/N) |
  voluntary |
   reporter |
  disclosed |
   identity |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,183       91.83       91.83
          N |        556        5.56       97.39
          Y |        261        2.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Dec 2015